Ghost edge 3.5 trigger kit for glocks gen 1-5 drop-in FEATURES-For Glock Gens 1-4-One Edge 3.5-One 6.0 lb. Trigger Spring-One 4.0 lb. Firing Pin Spring (target/sport configuration)-One 6.0 lb. Firing Pin Spring (self-defense configuration)-One Reduced power firing pin safety spring Other Features: Drop-in connector for glock for 3.5 lbs trigger pull includes connector and wolf brand springs for the best possible trigger pull edge connector is lighter and smoother and eliminates the pre-travel bump, does not fit glock 42/43